Zobrazeno 1 - 10
of 5 907
pro vyhledávání: '"Aird, A."'
Supermassive black holes (SMBHs) are observed in diverse galaxy populations across time yet a clear understanding of how they coevolve with their hosts has not been reached. Physically-motivated models of SMBH accretion and feedback vary widely betwe
Externí odkaz:
http://arxiv.org/abs/2411.08838
Autor:
Roster, William, Salvato, Mara, Krippendorf, Sven, Saxena, Aman, Shirley, Raphael, Buchner, Johannes, Wolf, Julien, Dwelly, Tom, Bauer, Franz E., Aird, James, Ricci, Claudio, Assef, Roberto J., Anderson, Scott F., Liu, Xin, Merloni, Andrea, Weller, Jochen, Nandra, Kirpal
Computing photo-z for AGN is challenging, primarily due to the interplay of relative emissions associated with the SMBH and its host galaxy. SED fitting methods, effective in pencil-beam surveys, face limitations in all-sky surveys with fewer bands a
Externí odkaz:
http://arxiv.org/abs/2411.07305
Autor:
Aird, Amanda, Štefancová, Elena, All, Cassidy, Voida, Amy, Homola, Martin, Mattei, Nicholas, Burke, Robin
Algorithmic fairness in recommender systems requires close attention to the needs of a diverse set of stakeholders that may have competing interests. Previous work in this area has often been limited by fixed, single-objective definitions of fairness
Externí odkaz:
http://arxiv.org/abs/2410.04551
Autor:
Zhang, Haowen, Behroozi, Peter, Volonteri, Marta, Silk, Joseph, Fan, Xiaohui, Aird, James, Yang, Jinyi, Wang, Feige, Hopkins, Philip F.
We infer supermassive black hole (SMBH) accretion rates and Eddington ratios as a function of SMBH/host galaxy mass and redshift with the empirical TRINITY model of dark matter halo--galaxy--SMBH connection. The galaxy--SMBH mass and growth rate conn
Externí odkaz:
http://arxiv.org/abs/2409.16347
Autor:
Guetzoyan, Paloma, Aird, James, Georgakakis, Antonis, Coil, Alison L., Barlow-Hall, Cassandra, Hickox, Ryan C., Rankine, Amy L., Terrazas, Bryan A.
Supermassive Black Holes (BHs) are known to efficiently grow through gas accretion, but even sustained and intense mass build-up through this mechanism struggles to explain the assembly of the most massive BHs observed in the local Universe. Using th
Externí odkaz:
http://arxiv.org/abs/2408.14297
The complex and evolving threat landscape of frontier AI development requires a multi-layered approach to risk management ("defense-in-depth"). By reviewing cybersecurity and AI frameworks, we outline three approaches that can help identify gaps in t
Externí odkaz:
http://arxiv.org/abs/2408.07933
Autor:
Greenwell, Claire L., Klindt, Lizelke, Lansbury, George B., Rosario, David J., Alexander, David M., Aird, James, Stern, Daniel, Forster, Karl, Koss, Michael J., Bauer, Franz E., Ricci, Claudio, Tomsick, John, Brandt, William N., Connor, Thomas, Boorman, Peter G., Annuar, Adlyka, Ballantyne, David R., Chen, Chien-Ting, Civano, Francesca, Comastri, Andrea, Fawcett, Victoria A., Fornasini, Francesca M., Gandhi, Poshak, Harrison, Fiona, Heida, Marianne, Hickox, Ryan, Kammoun, Elias S., Lanz, Lauranne, Marchesi, Stefano, Noirot, Gaël, Romero-Colmenero, Encarni, Treister, Ezequiel, Urry, C. Megan, Väisänen, Petri, van Soelen, Brian
We present a catalog of hard X-ray serendipitous sources detected in the first 80 months of observations by the Nuclear Spectroscopic Telescope Array (NuSTAR). The NuSTAR serendipitous survey 80-month (NSS80) catalog has an unprecedented $\sim$ 62 Ms
Externí odkaz:
http://arxiv.org/abs/2404.17637
Autor:
Laloux, Brivael, Georgakakis, Antonis, Alexander, David M., Buchner, Johannes, Andonie, Carolina, Acharya, Nischal, Aird, James, Alonso-Tetilla, Alba V., Bongiorno, Angela, Hickox, Ryan C., Lapi, Andrea, Musiimenta, Blessing, Almeida, Cristina Ramos, Villforth, Carolin, Shankar, Francesco
Publikováno v:
MNRAS 532 (2024) 3459-3479
We adopt a Bayesian X-ray spectral approach to investigate the accretion properties of unobscured ($20<\log(N_{\rm H}/{\rm cm}^{-2}<22$) and obscured ($22< \log(N_{\rm H}/{\rm cm}^{-2}<24$) active galactic nuclei (AGN) to shed light on the orientatio
Externí odkaz:
http://arxiv.org/abs/2403.07109
AI alignment work is important from both a commercial and a safety lens. With this paper, we aim to help actors who support alignment efforts to make these efforts as effective as possible, and to avoid potential adverse effects. We begin by suggesti
Externí odkaz:
http://arxiv.org/abs/2312.08039
Autor:
Civano, Francesca, Zhao, Xiurui, Boorman, Peter, Marchesi, Stefano, Ananna, Tonima, Creech, Samantha, Chen, Chien-Ting, Hickox, Ryan, Stern, Daniel, Madsen, Kristin, García, Javier A., Silver, Ross, Aird, James, Alexander, David M., Balokovíc, Mislav, Brandt, William N., Buchner, Johannes, Gandhi, Poshak, Kammoun, Elias, LaMassa, Stephanie, Lanzuisi, Giorgio, Merloni, Andrea, Moretti, Alberto, Nandra, Kirpal, Nardini, Emanuele, Pizzetti, Anrealuna, Puccetti, Simonetta, Pfeifle, Ryan, Ricci, Claudio, Spiga, Daniele, Torres-Albá, Nuria, Collaboration, the HEX-P
Since the discovery of the cosmic X-ray background (CXB), astronomers have strived to understand the accreting supermassive black holes (SMBHs) contributing to its peak in the 10-40 keV band. Existing soft X-ray telescopes could study this population
Externí odkaz:
http://arxiv.org/abs/2311.04832